Bug #2783: Segmentation Fault (using libxml-ruby)

• Status: Rejected
• Assignee: -
• ruby -v: ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-mingw32]

[ddonia (Damián D'Onia)]

=begin
I was running a program that creates a new XML node each iteration and save it to a file. I'm newbi using Ruby. This was the error text:

C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:36: [BUG] Segmentation fault
ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-mingw32]

-- control frame ----------
c:0015 p:---- s:0051 b:0051 l:000050 d:000050 CFUNC :[]
c:0014 p:0008 s:0047 b:0047 l:000028 d:000046 BLOCK C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:36
c:0013 p:---- s:0043 b:0043 l:000042 d:000042 FINISH
c:0012 p:---- s:0041 b:0041 l:000040 d:000040 CFUNC :each
c:0011 p:0058 s:0038 b:0038 l:000028 d:000037 BLOCK C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:35
c:0010 p:---- s:0034 b:0034 l:000033 d:000033 FINISH
c:0009 p:---- s:0032 b:0032 l:000031 d:000031 CFUNC :each
c:0008 p:0055 s:0029 b:0029 l:000028 d:000028 METHOD C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:32
c:0007 p:0118 s:0025 b:0025 l:000024 d:000024 METHOD C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file_manager.rb:111
c:0006 p:0065 s:0018 b:0018 l:001a3c d:000017 BLOCK C:/workspace/netbeans/DespegarLogPreProcessor/lib/main.rb:20
c:0005 p:---- s:0013 b:0013 l:000012 d:000012 FINISH
c:0004 p:---- s:0011 b:0011 l:000010 d:000010 CFUNC :each
c:0003 p:0108 s:0008 b:0008 l:001a3c d:00193c EVAL C:/workspace/netbeans/DespegarLogPreProcessor/lib/main.rb:13
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:001a3c d:001a3c TOP

C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:36: [BUG] object allocation during garbage collection phase
ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-mingw32]

-- control frame ----------
c:0015 p:---- s:0051 b:0051 l:000050 d:000050 CFUNC :[]
c:0014 p:0008 s:0047 b:0047 l:000028 d:000046 BLOCK C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:36
c:0013 p:---- s:0043 b:0043 l:000042 d:000042 FINISH
c:0012 p:---- s:0041 b:0041 l:000040 d:000040 CFUNC :each
c:0011 p:0058 s:0038 b:0038 l:000028 d:000037 BLOCK C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:35
c:0010 p:---- s:0034 b:0034 l:000033 d:000033 FINISH
c:0009 p:---- s:0032 b:0032 l:000031 d:000031 CFUNC :each
c:0008 p:0055 s:0029 b:0029 l:000028 d:000028 METHOD C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:32
c:0007 p:0118 s:0025 b:0025 l:000024 d:000024 METHOD C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file_manager.rb:111
c:0006 p:0065 s:0018 b:0018 l:001a3c d:000017 BLOCK C:/workspace/netbeans/DespegarLogPreProcessor/lib/main.rb:20
c:0005 p:---- s:0013 b:0013 l:000012 d:000012 FINISH
c:0004 p:---- s:0011 b:0011 l:000010 d:000010 CFUNC :each
c:0003 p:0108 s:0008 b:0008 l:001a3c d:00193c EVAL C:/workspace/netbeans/DespegarLogPreProcessor/lib/main.rb:13
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:001a3c d:001a3c TOP

-- Ruby level backtrace information-----------------------------------------
C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:36:in []' C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:36:in block (2 levels) in getrecord'
C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:35:in each' C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:35:in block in getrecord'
C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:32:in each' C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file.rb:32:in getrecord'
C:/workspace/netbeans/DespegarLogPreProcessor/lib/despegar_log_file_manager.rb:111:in to_xml3' C:/workspace/netbeans/DespegarLogPreProcessor/lib/main.rb:20:in block in '
C:/workspace/netbeans/DespegarLogPreProcessor/lib/main.rb:13:in each' C:/workspace/netbeans/DespegarLogPreProcessor/lib/main.rb:13:in '

[NOTE]
You may encounter a bug of Ruby interpreter. Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
=end

[jonforums (Jon Forums)]

=begin
Please show the results of running the following commands

gem env

gem list libxml-ruby -d

=end

[jonforums (Jon Forums)]

=begin
If you've somehow installed the x86-mswin32-60 gem in your RubyInstaller environment, the gem linked against a different Ruby version (MSVCRT-RUBY18.DLL) than the 1.9.1 version you're running. This issue is a known cause of segfaults.

A very good XML library that uses libxml2 is Nokogiri http://nokogiri.org/

It is well documented, well maintained, and works well on multiple Ruby versions and implementations including Windows. I'd highly suggest the switch. Try it out with a simple "gem install nokogiri"

Jon
=end

[ddonia (Damián D'Onia)]

=begin
Jon,

  These are the results for the commands that you ask for:

gem env:
RubyGems Environment:

• RUBYGEMS VERSION: 1.3.5
• RUBY VERSION: 1.9.1 (2010-01-10 patchlevel 378) [i386-mingw32]
• INSTALLATION DIRECTORY: C:/Ruby19/lib/ruby/gems/1.9.1
• RUBY EXECUTABLE: C:/Ruby19/bin/ruby.exe
• EXECUTABLE DIRECTORY: C:/Ruby19/bin
• RUBYGEMS PLATFORMS:
  • ruby
  • x86-mingw32
• GEM PATHS:
  • C:/Ruby19/lib/ruby/gems/1.9.1
  • C:/Documents and Settings/ddonia/.gem/ruby/1.9.1
• GEM CONFIGURATION:
  • :update_sources => true
  • :verbose => true
  • :benchmark => false
  • :backtrace => false
  • :bulk_threshold => 1000
• REMOTE SOURCES:
  • http://gems.rubyforge.org/

gem list libxml-ruby -d:
libxml-ruby (1.1.3)
Author: Charlie Savage
Rubyforge: http://rubyforge.org/projects/libxml
Homepage: http://libxml.rubyforge.org/
Installed at: C:/Ruby19/lib/ruby/gems/1.9.1

 Ruby libxml bindings

Thanks in advance,

dd. //
=end

[mame (Yusuke Endoh)]

• Status changed from Open to Feedback

=begin
Hi,

Could you show your source code that triggers SEGV?

--
Yusuke Endoh [e-mail]
=end

[naruse (Yui NARUSE)]

• Status changed from Feedback to Rejected

=begin

=end

[ogechinnadi (ogechi nnadi)]

=begin
Hi all, I'm getting the same segfault as DD above. My gem environment is as follows

$ gem env
RubyGems Environment:

• RUBYGEMS VERSION: 1.3.6
• RUBY VERSION: 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10]
• INSTALLATION DIRECTORY: /opt/local/lib/ruby/gems/1.8
• RUBY EXECUTABLE: /opt/local/bin/ruby
• EXECUTABLE DIRECTORY: /opt/local/bin
• RUBYGEMS PLATFORMS:
  • ruby
  • x86-darwin-10
• GEM PATHS:
  • /opt/local/lib/ruby/gems/1.8
  • /Users/ogechinnadi/.gem/ruby/1.8
• GEM CONFIGURATION:
  • :update_sources => true
  • :verbose => true
  • :benchmark => false
  • :backtrace => false
  • :bulk_threshold => 1000
  • :sources => ["http://gemcutter.org", "http://gems.rubyforge.org", "http://gems.github.com"]
  • "gem" => "--no-ri --no-rdoc"
• REMOTE SOURCES:
  • http://gemcutter.org
  • http://gems.rubyforge.org
  • http://gems.github.com

$ gem list libxml-ruby -d

*** LOCAL GEMS ***

libxml-ruby (1.1.4)
Author: Charlie Savage
Rubyforge: http://rubyforge.org/projects/libxml
Homepage: http://libxml.rubyforge.org/
Installed at: /opt/local/lib/ruby/gems/1.8

 Ruby libxml bindings

The code that causes the crash is as follows (in IRB):

require 'xml'
=> true
document = LibXML::XML::Document.file('s.txt')
/opt/local/lib/ruby/gems/1.8/gems/libxml-ruby-1.1.4/lib/libxml/parser.rb:33: [BUG] Segmentation fault
ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10]

Abort trap

I hope this helps you find the problem.

=end

[luislavena (Luis Lavena)]

=begin
Hello,

This is highly likely a 3rd party issue.

Please open a Ticket on libxml-ruby project, provide the same code and the test XML data file (s.txt) that you mention but forgot to attach.

Thank you.
=end